A patient has a large meal and asks how the digestive tract moves food forward without gravity. Which explanation is correct?
Correct answer: A. Rhythmic peristaltic contractions push the contents onward
- A. Rhythmic peristaltic contractions push the contents onward
- B. The villi pull food directly into the bloodstream
- C. Bile causes the intestine to contract as one solid tube
- D. The pancreas pumps food through the intestinal wall
Explanation
Peristalsis consists of coordinated waves of smooth muscle contraction that propel contents through the alimentary canal. Villi absorb nutrients, bile assists fat digestion, and the pancreas releases secretions rather than pumping food.
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About Digestive System
The digestive system covers the structure and functions of the alimentary canal from mouth to anus, along with the liver, gallbladder and pancreas. It explains mechanical and chemical digestion, the action of major enzymes, absorption through intestinal villi, and how digestion differs from absorption and assimilation.
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40 free Digestive System MCQs from Anatomy and Physiology for Nursing, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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